Burglar-alarm



(No Model.)

R'. T. SMILLIE.

BURG-LAR ALARM. l No. 395,519. Patented Jan. l, 1889.

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lNirED STATES.

PATENT FFICE.

ROBERT T. SMILLE, 0F NEVARK, NEV JERSEY.

BURGLAREALARM.

SPECIFICATION forming part of Letters Patent No. 395,519, dated January 1, 1889.

Application filed August l, 1888. Serial No. 281,612. (No model.) i

To all w/Lont 'it may concern.-

Be it known that I, ROBERT T. SMILLIE, a citizen of the United Stat-es, residing at Newark, in the county of Essex and State of New Jersey, have invented certain new and useful, Improvements in Burglar-Alarms; and I do hereby declare the following to be a full, clear, and exact description of thc invention, such as will enable oth ers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

The object of this invention isto provide at a small expense a convenient, durable, and portable burglar-alarm, which can be applied to a door or window-sash and give an alarm if an attempt be made to open it; and the invention consists in the improved burglaralarm and in the combinations of parts thereof, substantially as will be hereinafter set forth, and finallyv embodied in the clauses of the claim.

Referring to the accompanying drawings, in which like letters of reference indicate corresponding parts in each of the several iignres, Figure 1 is a front elevation of a window-sash with the burglar-alarm attached to it. Fig. 2 is a front elevation of the burglaralarm with the cap removed, showing the mechanism for operating the gong or bell. Fig. 3 is a side elevation with a portion of the case broken away, showing the detent. Fig. 4i is a sectional view of a clamp for securing the alarm to door or window-sash on line fy, Fig. Fig. 5 is a sectional vcw of the clamp through line so, Fig. 3.

In said drawings, a represents a case or box for holding the mechanism for operating the alarm with the under side extending, as shown at a.

b is a post or stud on which rests a gong or hell, c, of ordinary construction.

d is a screw for holding the lon or lhell in position on the stud.

e is a narrow strip of metal secured to the side of the case with its edges grooved, in which slides an adjustable clamp, f and j". The part f has a centrally-elongated slot, g, to allow it to slide on the narrow strip e, secured t0 the case. The part f of the clamp has a the strip e, and so arranged that the part j" cannot pass in one direction beyond the edge of the case, while in the other direction it can slide upon the under part, f, throughout its whole length.

't' is a thumb-screw for binding the two parts f and f securely together, when the alarm is placed upon the edge of a door or on a window-sash, and is arranged to slide in the slots in the clamp.

W'ithin the case, as shown in Fig. 2, is placed a small ordinary clock-movement with a pallet, l, secured in the ordinary manner to the shaft 2. To this shaft is secured a rod, 3, having on its end a bell-hammer, 4.

5 is a rod also secured to shaft 2 and extending in a direction opposite to rod fi and having its outer end bent, as shown in Fig. 3.

6 is a rod or pin with astop-piece, 7, rigidlyT secured to it or made integral therewith. This pin moves freelyin holes in the top and bottom of the case.

8 is a small pin or detent secured to pin G, and 9 is a coiled wire spring surrounding said pin 6.

In the drawings l have shown the burglaralarm as provided with a clamp or jaw, which is adjustable to any thickness of door or sash; but any other form of clamp may be used, or the alarm may be held in place by springs, and the position of the clamp on the alarm can be changed as circumstances may rcqnire.

In applying the alarm to a door the projectionA on the part f (seen in Fig. 4) is placed against the edge of the door at any point desired. The projection on the part f is then brought up firmly against the opposite side of the door. The thumb-screw yL' is then tightly screwed up, and binds the two parts or jaws firmly together, thus securing the alarm to the door close to the edge, but extending outward therefrom. lVhcn the door is closed, the pin 6 strikes against the door casing or frame, and is forced inward in the direction shown by the arrow in Fig. 3 until the end is iiush or even with the case of the alarm. In this position the pin 8 engages with the end of rod 5, as shown in Fig. 2, and prevents the pallet l from Working. The spring' in the clock-movement is then Wound up and the ala-rin is ready. If the door should then be open ed, either from the outside or inside, the pin G would be forced out by the action of the coiled wire spring' 'into the position shown in Fig'. f3, and with it the pin 8, Which will thus be released from contact with rod 5, and the clock-spring'would instantly begin to unwind, and, by means of the pallet, cause the bell-ham mer to strike :intermittingly upon the bell. This ringing of the bell would continue until the sprin was entirely u n Wo u n d or the piu was again push ed in, as beli'ore stated.

In applying the alarm to a window itis prei"- erably secured to the window frame orrasing', as shown in Fig'. 1l, so that the pin (l will be pushed in by the sash and held there untilthe sash is raised, when vit will be released and the bell ring' continuously, as before described.

This burglar-alarm can be made small, so as to be easily carried in a satchel or trunk with.-

out inconvenience, and thus furnishes a pro- 1 teetion to travelers when at hotels, as .it can be quickly applied. to any door or window.

Having thus described the invention, what I claim as new isl. In a lmrglar-alarm, the combination of clamp ef, the part r being secured to the case of the alarm, and the part f being' adjustably secured to the part e, a train of Wheels and a bell, a bell -liammer connected with said Wheels, a spring,I for actu ating` said Wheels and hammer, pin G, detent 8, secured to said pin for automatically locking and releasing said Wheels, as described, and a spring adapted to hold said pin and detent normally out of contact with the bell attachment, all said parts beingl arranged and combined as and for the purposes set forth.

2. The combination, in the case of a burglar-alarm, with a train of Wheels, a bell-han1 mer connected therewith, and a spring' for actuating said Wheels and bell-hammer, of a lever, 5, pivotally connected to said case and with the bell-hammer lever 3, pin 6, adapted to move in and through the upper and lower walls ot' the case, and detent 8, secured to said pin (i an d adapted to engage with the 1 ree end olf lever 5 for automatically lockingI and releasing the pallet l from contact with the train of Wheels, all said parts being arranged and combined substantially as and for the purposes set forth.

In testimony that I claim the foregoingr I have hereunto set my hand this 10th day olf July, 1388.

ROBERT T. SMILLIE. lVitnesses:

OLIVER DRAKE, E; L. SHERMAN. 

